using System;
using System.Collections.Generic;
using UnityEngine;

namespace DepthsOfGreed.HandbookUI
{
    public enum SupplyKind { None = -1, Physical = 0, EnergyCells = 1, Special = 2 }
    public enum SupplyTruckPhase { Idle, Loading, Driving, Unloading }
    public enum SupplyStop { PhysicalTank = 0, EnergyTank = 1, SpecialTank = 2, Distributor = 3 }
    public enum SupplyConsumption { PerShot, WhileFiring }

    [Serializable]
    public sealed class TowerSupplyDefinition
    {
        [Tooltip("None = kein Kelleranschluss.")]
        public SupplyKind kind = SupplyKind.None;
        [Min(0)] public float magazineCapacity = 60;
        [Tooltip("Startfüllung pro neu gebauter Turminstanz, nicht der aktuelle Magazinstand.")]
        [Min(0)] public float initialAmmo = 60;
        [Tooltip("Maximale Nachfüllrate vom Verteiler ins Turmmagazin.")]
        [Min(0)] public float refillPerSecond = 10;
        public SupplyConsumption consumption = SupplyConsumption.PerShot;
        [Tooltip("Bei PerShot: nur bei einem tatsächlich abgefeuerten Schuss verbuchen.")]
        [Min(0)] public float unitsPerShot = 1;
        [Tooltip("Bei WhileFiring: nur während tatsächlicher Feuerzeit verbuchen.")]
        [Min(0)] public float unitsPerFiringSecond;
    }

    // A detached display snapshot. Gameplay retains ownership of all live state.
    public sealed class SupplyState
    {
        public SupplyKind priority = SupplyKind.None;
        public IReadOnlyList<SupplyChannelState> channels = Array.Empty<SupplyChannelState>();
        public IReadOnlyList<TowerSupplyState> towers = Array.Empty<TowerSupplyState>();
        public SupplyTruckState truck;
    }
    public sealed class SupplyChannelState
    {
        public SupplyKind kind;
        public float storage, storageCapacity;
        public float buffer, bufferCapacity;
        // Optional, measured consumption; not theoretical fire rate.
        public float? consumedPerSecond;
    }
    public sealed class TowerSupplyState
    {
        // Must be the same stable instance ID as BuiltObjectSnapshot.instanceId.
        public long instanceId;
        public HandbookTowerEntry type;
        public bool connected = true;
        public float magazine, magazineCapacity;
        public float? consumedPerSecond;
    }
    public sealed class SupplyTruckState
    {
        public SupplyTruckPhase phase;
        public SupplyKind cargoKind = SupplyKind.None;
        public float cargo, cargoCapacity;
        public SupplyStop from, to;
        [Range(0,1)] public float progress;
    }
    public readonly struct SupplyCommandResult
    {
        public readonly bool accepted;
        public readonly string message;
        public SupplyCommandResult(bool accepted, string message = null) { this.accepted = accepted; this.message = message; }
    }

    // Implement on a MonoBehaviour. The UI polls at 4 Hz and never consumes ammunition.
    public interface ISupplyGameplay
    {
        SupplyState ReadState();
        SupplyCommandResult SetConnected(long instanceId, bool connected);
        SupplyCommandResult SetPriority(SupplyKind priority);
    }
}